NUS Atlantic Shipyards

[Jefgte]

After rebuilding 25 de Mayo & The Nueva class cruisers armament , NUS is going to change the engines of the light BB Islas Malvinas & the ACs of the Bariloche Class.

Here is the BB Islas Malvinas engines rebuilt:

Original

Islas Malvinas, NUS BB laid down 1909

Displacement:
   18 266 t light; 19 221 t standard; 20 708 t normal; 21 898 t full load

Dimensions: Length overall / water x beam x draught
   557.00 ft / 557.00 ft x 92.00 ft x 26.00 ft (normal load)
   169.77 m / 169.77 m x 28.04 m  x 7.92 m

Armament:
     6 - 12.00" / 305 mm guns (3x2 guns), 1 045.00lbs / 474.00kg shells, 1909 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, majority aft
     14 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1909 Model
     Breech loading guns in casemate mounts
     on side, evenly spread
     14 guns in hull casemates - Limited use in heavy seas
     18 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1909 Model
     Quick firing guns in casemate mounts
     on side, evenly spread
     8 guns in hull casemates - Limited use in heavy seas
     6 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1909 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 8 439 lbs / 3 828 kg
   Shells per gun, main battery: 110

Armour:
  - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12.0" / 305 mm   390.00 ft / 118.87 m   12.00 ft / 3.66 m
   Ends:   4.00" / 102 mm   167.00 ft / 50.90 m   10.00 ft / 3.05 m
   Upper:   8.00" / 203 mm   390.00 ft / 118.87 m   8.00 ft / 2.44 m
     Main Belt covers 108 % of normal length

  - Torpedo Bulkhead:
      1.50" / 38 mm   410.00 ft / 124.97 m   31.00 ft / 9.45 m

  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13.0" / 330 mm   8.00" / 203 mm      11.0" / 279 mm
   2nd:   4.00" / 102 mm   2.00" / 51 mm      1.00" / 25 mm
   3rd:   4.00" / 102 mm   2.00" / 51 mm      1.00" / 25 mm
   4th:   0.50" / 13 mm         -               -

  - Armour deck: 2.50" / 64 mm, Conning tower: 11.00" / 279 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 3 shafts, 30 591 shp / 22 821 Kw = 21.50 kts
   Range 7 000nm at 12.00 kts
   Bunker at max displacement = 2 677 tons

Complement:
   863 - 1 122

Cost:
   £1.606 million / $6.424 million

Distribution of weights at normal displacement:
   Armament: 919 tons, 4.4 %
   Armour: 8 026 tons, 38.8 %
      - Belts: 3 740 tons, 18.1 %
      - Torpedo bulkhead: 705 tons, 3.4 %
      - Armament: 1 757 tons, 8.5 %
      - Armour Deck: 1 645 tons, 7.9 %
      - Conning Tower: 179 tons, 0.9 %
   Machinery: 1 391 tons, 6.7 %
   Hull, fittings & equipment: 7 530 tons, 36.4 %
   Fuel, ammunition & stores: 2 443 tons, 11.8 %
   Miscellaneous weights: 400 tons, 1.9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     40 154 lbs / 18 214 Kg = 46.5 x 12.0 " / 305 mm shells or 7.6 torpedoes
   Stability (Unstable if below 1.00): 1.29
   Metacentric height 6.9 ft / 2.1 m
   Roll period: 14.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 72 %
         - Recoil effect (Restricted arc if above 1.00): 0.40
   Seaboat quality  (Average = 1.00): 1.80

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.544
   Length to Beam Ratio: 6.05 : 1
   'Natural speed' for length: 23.60 kts
   Power going to wave formation at top speed: 45 %
   Trim (Max stability = 0, Max steadiness = 100): 40
   Bow angle (Positive = bow angles forward): -5.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      23.00 ft / 7.01 m
      - Forecastle (15 %):   22.00 ft / 6.71 m
      - Mid (60 %):      20.00 ft / 6.10 m
      - Quarterdeck (15 %):   20.00 ft / 6.10 m
      - Stern:      20.00 ft / 6.10 m
      - Average freeboard:   20.81 ft / 6.34 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 74.9 %
      - Above water (accommodation/working, high = better): 162.0 %
   Waterplane Area: 35 562 Square feet or 3 304 Square metres
   Displacement factor (Displacement / loading): 112 %
   Structure weight / hull surface area: 152 lbs/sq ft or 740 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.93
      - Longitudinal: 1.86
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather


The rebuilt with new engines

Islas Malvinas, NUS BB laid down 1909 (Engine 1916)

Displacement:
   19 125 t light; 20 087 t standard; 21 217 t normal; 22 120 t full load

Dimensions: Length overall / water x beam x draught
   557.00 ft / 557.00 ft x 92.00 ft x 26.64 ft (normal load)
   169.77 m / 169.77 m x 28.04 m  x 8.12 m

Armament:
      6 - 12.00" / 305 mm guns (3x2 guns), 1 045.00lbs / 474.00kg shells, 1909 Model
     Breech loading guns in turrets (on barbettes)
     on centreline, evenly spread
     Aft Main mounts separated by engine room
      14 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1909 Model
     Breech loading guns in casemate mounts
     on side, evenly spread
     14 guns in hull casemates - Limited use in heavy seas
      18 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1909 Model
     Quick firing guns in casemate mounts
     on side, evenly spread
     8 guns in hull casemates - Limited use in heavy seas
      12 - 1.57" / 40.0 mm guns (6x2 guns), 1.95lbs / 0.88kg shells, 1909 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 8 381 lbs / 3 802 kg
   Shells per gun, main battery: 110

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12.0" / 305 mm   390.00 ft / 118.87 m   12.00 ft / 3.66 m
   Ends:   4.00" / 102 mm   167.00 ft / 50.90 m   10.00 ft / 3.05 m
   Upper:   8.00" / 203 mm   390.00 ft / 118.87 m   8.00 ft / 2.44 m
     Main Belt covers 108 % of normal length

   - Torpedo Bulkhead:
      1.50" / 38 mm   410.00 ft / 124.97 m   31.00 ft / 9.45 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13.0" / 330 mm   8.00" / 203 mm      11.0" / 279 mm
   2nd:   4.00" / 102 mm   2.00" / 51 mm      1.00" / 25 mm
   3rd:   4.00" / 102 mm   2.00" / 51 mm      1.00" / 25 mm
   4th:   0.50" / 13 mm         -               -

   - Armour deck: 2.50" / 64 mm, Conning tower: 11.00" / 279 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 3 shafts, 60 000 shp / 44 760 Kw = 25.46 kts
   Range 7 000nm at 12.00 kts
   Bunker at max displacement = 2 033 tons

Complement:
   878 - 1 142

Cost:
   £1.748 million / $6.993 million

Distribution of weights at normal displacement:
   Armament: 912 tons, 4.3 %
   Armour: 8 006 tons, 37.7 %
      - Belts: 3 740 tons, 17.6 %
      - Torpedo bulkhead: 705 tons, 3.3 %
      - Armament: 1 735 tons, 8.2 %
      - Armour Deck: 1 645 tons, 7.8 %
      - Conning Tower: 182 tons, 0.9 %
   Machinery: 2 235 tons, 10.5 %
   Hull, fittings & equipment: 7 572 tons, 35.7 %
   Fuel, ammunition & stores: 2 091 tons, 9.9 %
   Miscellaneous weights: 400 tons, 1.9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     31 758 lbs / 14 405 Kg = 36.8 x 12.0 " / 305 mm shells or 5.7 torpedoes
   Stability (Unstable if below 1.00): 1.15
   Metacentric height 5.7 ft / 1.7 m
   Roll period: 16.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.42
   Seaboat quality  (Average = 1.00): 1.20

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.544
   Length to Beam Ratio: 6.05 : 1
   'Natural speed' for length: 23.60 kts
   Power going to wave formation at top speed: 54 %
   Trim (Max stability = 0, Max steadiness = 100): 59
   Bow angle (Positive = bow angles forward): -5.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      22.34 ft / 6.81 m
      - Forecastle (15 %):   21.31 ft / 6.50 m
      - Mid (60 %):      19.34 ft / 5.90 m
      - Quarterdeck (15 %):   19.34 ft / 5.90 m
      - Stern:      19.34 ft / 5.90 m
      - Average freeboard:   20.14 ft / 6.14 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 89.1 %
      - Above water (accommodation/working, high = better): 154.1 %
   Waterplane Area: 35 562 Square feet or 3 304 Square metres
   Displacement factor (Displacement / loading): 105 %
   Structure weight / hull surface area: 153 lbs/sq ft or 745 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.94
      - Longitudinal: 1.75
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
Calculation:

Was - 1919H1
18266tl - 21898tfl
Old Engines: 30591shp – 139
To scrapp: 208t + 0.2BP + 0.2$
Fuel: 2677t

Rebuilt in 1919H2:
19125tl – 22354tfl
New Engines: 60000shp – 2235t
Fuel: 2033t
Calculation:
2235t – 2.235BP – 4.47$



 

[Sachmle]

I like, but:

Refurbishments

A refurbishment is a more comprehensive refit which allows for replacement of obsolete or undesired fittings as well as overhauling any original equipment that remains.  Since a ship can get by on overhauls through its entire career, a refurbishment is never mandatory.  However, a ship that is refurbished is likely to be more effective than a ship that is merely overhauled.

A refurbishment costs 20% of the original dollar cost of construction, plus the dollar and BP costs of new components described below.  Refurbishments take the greater of 2.5 months, or 25% of the ship's original minimum time of construction plus one month per 2 BP of new components added to the ship.

See below for a description of what can and can not be done in a refurbishment.  Note that "tonnage" refers to those in a Springstyle report's "Distribution of weights at normal displacement"

Armament and machinery

All deck mounts and casemates, and secondary turret/barbettes, can be moved, added or deleted; main battery turret/barbettes can be replaced by turret/barbettes of equal or smaller roller diameter or other components allowed during refurbishments.  Newer machinery can be installed, but the weight can not exceed the previous set of machinery. 

BP cost = (tonnage/1000); $ cost = twice the BP cost.

So:
Base Cost (Original Cost * 20%)= $3.65
New Engines (Can't exceed 1,391t since that was weight of original) = $2.78 & 1.39BP
Scrap of old engines (1,391t at 15%) 1.391*0.15 = $0.21 & 0.21BP
Total cost $3.65+$2.78-$0.21 = $6.22 and 1.39-0.21= 1.18BP

[Jefgte]

Reconstruction
This is the most elaborate type of refit, and marks a comprehensive change to the ship's internal structure or hull form.

The base dollar cost of a reconstruction is 25% of the original build cost.  There is also a BP requirement, 10% of original build requirement, as a result of widespread changes and movement of bulkheads.  Finally, there is also the dollar and BP costs of new components described below.  Refurbishments take the greater of 2.5 months, or 25% of the ship's original minimum time of construction plus one month per BP of new components added to the ship.

Armament and machinery

Main battery turret/barbettes can be raised.  Machinery spaces can be enlarged at the expense of other components.  

BP cost = (tonnage/1000); $ cost = twice the BP cost

These are entirely new engines - 60000shp were 30000shp - weight 2235t - 2.235BPs

Modos  - Refurbishement or Reconstruction ?  ???

[TexanCowboy]

Reconstruction. You increased the weight of the engines.

[Jefgte]

This tall hull with relatively light armament can work over 25kts
with good stability, good seaboat quality & is always a good steady gun platform.


Jef

[TexanCowboy]

That's fine. And I agree. Although the 4'' guns are worthless and should be removed. I'm saying that since the total weight of the engine is doubled, it needs to be a reconstruction.

[Sachmle]

Yes Jef, I know they're new engines, but for a refurbishment you can't change the total machinery weight:

Newer machinery can be installed, but the weight can not exceed the previous set of machinery.

So you'd have to get whatever 1,391t of 1916 engines will get you. Or, as TexanCowboy pointed out, you can go full Rebuild and put whatever engines you want in, but it costs ALOT more.

Base Cost of Rebuild - 25% of Original cost & 10% of Original BP (18,283t*/1000 x 0.25 & 18,283t*/1000 x 0.10): $4.57075 and 1.8383BP (Figure round up to $4.57 & 1.84BP)
New Engines - Weight in BP + 2 x Weight in $: (2,235t): $4.47 and 2.235BP (Figure round up to $4.47 & 2.24BP)
Scrap of old Engines - 15% of Weight in $ and BP (1,391t x 0.15): $0.208 and 0.208BP (Figure round up to $0.21 and 0.21BP)
Total: $4.57+$4.47-$0.21= $8.83 and 1.84BP+2.24BP-0.21BP=3.86BP
SO: $8.83 and 3.87BP

Refurbishments take the greater of 2.5 months, or 25% of the ship's original minimum time of construction plus one month per BP of new components added to the ship.

So time will be 18,283*/1000 + 9 = 27.283 months original build time(Per rule, actually took longer) 25% of this is 6.82075 months (or lets just say 6.8mo).
Add 1 month per BP added: 1.83 + 2.24 = 4.08 (Call it 4BP) so 4 months added.
Total rebuild time: 10.8 months. (May as well call it 11 months)

BTW: Your SS if off. The "Original" light weight is 18,283t. Here is that SS:

Displacement:
   18,283 t light; 19,229 t standard; 20,716 t normal; 21,906 t full load

Dimensions: Length overall / water x beam x draught
   557.00 ft / 557.00 ft x 92.00 ft x 26.00 ft (normal load)
   169.77 m / 169.77 m x 28.04 m  x 7.92 m

Armament:
      6 - 12.00" / 305 mm guns (3x2 guns), 1,045.00lbs / 474.00kg shells, 1911 Model
     Breech loading guns in turrets (on barbettes)
     on centreline, evenly spread
     Aft Main mounts separated by engine room
      14 - 6.00" / 152 mm guns in single mounts, 100.00lbs / 45.36kg shells, 1905 Model
     Breech loading guns in casemate mounts
     on side, evenly spread
     14 guns in hull casemates - Limited use in heavy seas
      18 - 4.00" / 102 mm guns in single mounts, 30.00lbs / 13.61kg shells, 1906 Model
     Quick firing guns in casemate mounts
     on side, evenly spread
     8 guns in hull casemates - Limited use in heavy seas
      6 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1905 Model
     Quick firing guns in deck mounts
     on centreline, evenly spread, all raised mounts
   Weight of broadside 8,291 lbs / 3,761 kg
   Shells per gun, main battery: 110

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12.0" / 305 mm   390.00 ft / 118.87 m   12.00 ft / 3.66 m
   Ends:   4.00" / 102 mm   167.00 ft / 50.90 m   10.00 ft / 3.05 m
   Upper:   8.00" / 203 mm   390.00 ft / 118.87 m   8.00 ft / 2.44 m
     Main Belt covers 108 % of normal length

   - Torpedo Bulkhead:
      1.50" / 38 mm   410.00 ft / 124.97 m   31.00 ft / 9.45 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13.0" / 330 mm   8.00" / 203 mm      11.0" / 279 mm
   2nd:   4.00" / 102 mm   2.00" / 51 mm      1.00" / 25 mm
   3rd:   4.00" / 102 mm   2.00" / 51 mm      1.00" / 25 mm

   - Armour deck: 2.50" / 64 mm, Conning tower: 11.00" / 279 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 3 shafts, 30,601 shp / 22,828 Kw = 21.50 kts
   Range 7,000nm at 12.00 kts
   Bunker at max displacement = 2,677 tons

Complement:
   863 - 1,122

Cost:
   £1.607 million / $6.427 million

Distribution of weights at normal displacement:
   Armament: 919 tons, 4.4 %
   Armour: 8,014 tons, 38.7 %
      - Belts: 3,740 tons, 18.1 %
      - Torpedo bulkhead: 705 tons, 3.4 %
      - Armament: 1,745 tons, 8.4 %
      - Armour Deck: 1,645 tons, 7.9 %
      - Conning Tower: 179 tons, 0.9 %
   Machinery: 1,391 tons, 6.7 %
   Hull, fittings & equipment: 7,559 tons, 36.5 %
   Fuel, ammunition & stores: 2,433 tons, 11.7 %
   Miscellaneous weights: 400 tons, 1.9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     40,110 lbs / 18,194 Kg = 46.4 x 12.0 " / 305 mm shells or 7.6 torpedoes
   Stability (Unstable if below 1.00): 1.29
   Metacentric height 7.0 ft / 2.1 m
   Roll period: 14.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.38
   Seaboat quality  (Average = 1.00): 1.76

Hull form characteristics:
   Hull has raised forecastle
   Block coefficient: 0.544
   Length to Beam Ratio: 6.05 : 1
   'Natural speed' for length: 23.60 kts
   Power going to wave formation at top speed: 45 %
   Trim (Max stability = 0, Max steadiness = 100): 40
   Bow angle (Positive = bow angles forward): -5.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      23.00 ft / 7.01 m
      - Forecastle (15 %):   22.00 ft / 6.71 m (21.00 ft / 6.40 m aft of break)
      - Mid (60 %):      20.00 ft / 6.10 m
      - Quarterdeck (15 %):   20.00 ft / 6.10 m
      - Stern:      20.00 ft / 6.10 m
      - Average freeboard:   20.59 ft / 6.27 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 74.8 %
      - Above water (accommodation/working, high = better): 159.5 %
   Waterplane Area: 35,569 Square feet or 3,304 Square metres
   Displacement factor (Displacement / loading): 112 %
   Structure weight / hull surface area: 153 lbs/sq ft or 745 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.94
      - Longitudinal: 1.81
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Misc Weight as follows:
-250t FC
-50t Flag facilities
-25t W/T
-50t Crew Comfort measures
-25t Weight Reserve

[Jefgte]

...The base dollar cost of a reconstruction is 25% of the original build cost.  There is also a BP requirement, 10% of original build requirement, as a result of widespread changes and movement of bulkheads...

...I forgot the "Rebuilt Package Cost"

[Jefgte]

Originaly designed by Wes Wilson & modified by RAM



BB Paraguay redraw by Jef

[Jefgte]

In the NUS Atlantic Building plan, 200t torpedo patrol boats...

200t, NUS PTB-200 laid down 1919 (Engine 1916)

Displacement:
   200 t light; 206 t standard; 217 t normal; 225 t full load

Dimensions: Length overall / water x beam x draught
   191.81 ft / 188.65 ft x 16.40 ft x 6.20 ft (normal load)
   58.46 m / 57.50 m x 5.00 m  x 1.89 m

Armament:
     1 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1916 Model
     Anti-aircraft gun in deck mount
     on centreline forward
     1 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.88kg shells, 1916 Model
     Anti-aircraft gun in deck mount
     on centreline aft
     2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1905 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 16 lbs / 7 kg
   Shells per gun, main battery: 160
   2 - 18.0" / 457.2 mm above water torpedoes

Armour:
  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.50" / 13 mm         -               -
   2nd:   0.50" / 13 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 1 shaft, 4 800 shp / 3 581 Kw = 25.49 kts
   Range 1 000nm at 12.00 kts
          1600nm@10kts
          130nm@25kts
   Bunker at max displacement = 20 tons

Complement:
   27 - 36

Cost:
   £0.051 million / $0.203 million

Distribution of weights at normal displacement:
   Armament: 2 tons, 0.9 %
   Armour: 0 tons, 0.2 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 0 tons, 0.2 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 105 tons, 48.3 %
   Hull, fittings & equipment: 68 tons, 31.3 %
   Fuel, ammunition & stores: 17 tons, 7.7 %
   Miscellaneous weights: 25 tons, 11.5 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     60 lbs / 27 Kg = 4.4 x 3.0 " / 76 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.05
   Metacentric height 0.4 ft / 0.1 m
   Roll period: 11.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.16
   Seaboat quality  (Average = 1.00): 1.12

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.395
   Length to Beam Ratio: 11.50 : 1
   'Natural speed' for length: 13.73 kts
   Power going to wave formation at top speed: 65 %
   Trim (Max stability = 0, Max steadiness = 100): 62
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      11.81 ft / 3.60 m
      - Forecastle (20 %):   9.84 ft / 3.00 m
      - Mid (50 %):      7.22 ft / 2.20 m
      - Quarterdeck (18 %):   6.89 ft / 2.10 m
      - Stern:      6.56 ft / 2.00 m
      - Average freeboard:   8.15 ft / 2.49 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 175.3 %
      - Above water (accommodation/working, high = better): 66.2 %
   Waterplane Area: 1 795 Square feet or 167 Square metres
   Displacement factor (Displacement / loading): 54 %
   Structure weight / hull surface area: 16 lbs/sq ft or 77 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 2.48
      - Overall: 0.59
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped
   Ship has slow, easy roll, a good, steady gun platform

[Sachmle]

No anti ship guns? Range is too short even for coastal TB unless has dedicated "Tender/Leader" to refuel from. Stability is too low (1.05) and steadiness is to high (70%) for a ship not meant to shoot other ships. Since torpedoes are her main weapon I'd say you could lose some steadiness to up the stability. I'd probably ditch the weather shield (cuz at 13mm that's all it is) on the aft 40mm since it probably won't get that much spray back there anyway. (Must OTL DDs w/ enclosed mounts only had them on the foredeck) What is the 25t misc weight for? Torpedoes are obviously part of it, but the rest?

[Guinness]

Threadjack! (but only temporarily).

Here's the current working version of a 200t TB for the OE. I think it illustrates that you can get a lot more ship for 200t than this. For one thing, I think the Peruvian design has way to much freeboard, and the misc weight allocation is excessive.

200t Coastal Torpedo Boat, Ottoman Empire Torpedo Boat laid down 1920 (Engine 1916)

Displacement:
   200 t light; 206 t standard; 240 t normal; 267 t full load

Dimensions: Length overall / water x beam x draught
   181.26 ft / 177.49 ft x 16.90 ft x 6.56 ft (normal load)
   55.25 m / 54.10 m x 5.15 m  x 2.00 m

Armament:
      1 - 2.95" / 75.0 mm guns in single mounts, 12.87lbs / 5.84kg shells, 1920 Model
     Quick firing gun in deck mount
     on centreline forward
      2 - 2.24" / 57.0 mm guns in single mounts, 5.65lbs / 2.56kg shells, 1920 Model
     Quick firing guns in deck mounts
     on side, all aft
      2 - 0.51" / 13.0 mm guns in single mounts, 0.07lbs / 0.03kg shells, 1920 Model
     Machine guns in deck mounts
     on side, all amidships, all raised mounts - superfiring
   Weight of broadside 24 lbs / 11 kg
   Shells per gun, main battery: 111
   2 - 21.0" / 533.4 mm above water torpedoes

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.59" / 15 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 1 shaft, 9,100 shp / 6,788 Kw = 28.57 kts
   Range 1,729nm at 15.00 kts
   Bunker at max displacement = 61 tons
     Caution: Delicate, lightweight machinery

Complement:
   29 - 39

Cost:
   £0.066 million / $0.263 million

Distribution of weights at normal displacement:
   Armament: 3 tons, 1.3 %
   Armour: 1 tons, 0.4 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 1 tons, 0.4 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 131 tons, 54.4 %
   Hull, fittings & equipment: 59 tons, 24.6 %
   Fuel, ammunition & stores: 40 tons, 16.8 %
   Miscellaneous weights: 6 tons, 2.5 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     44 lbs / 20 Kg = 3.4 x 3.0 " / 75 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.08
   Metacentric height 0.4 ft / 0.1 m
   Roll period: 11.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 36 %
         - Recoil effect (Restricted arc if above 1.00): 0.13
   Seaboat quality  (Average = 1.00): 0.30

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.427
   Length to Beam Ratio: 10.50 : 1
   'Natural speed' for length: 13.32 kts
   Power going to wave formation at top speed: 74 %
   Trim (Max stability = 0, Max steadiness = 100): 86
   Bow angle (Positive = bow angles forward): 10.70 degrees
   Stern overhang: 1.97 ft / 0.60 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      9.51 ft / 2.90 m
      - Forecastle (14 %):   9.19 ft / 2.80 m
      - Mid (33 %):      9.02 ft / 2.75 m (5.09 ft / 1.55 m aft of break)
      - Quarterdeck (10 %):   5.09 ft / 1.55 m
      - Stern:      5.09 ft / 1.55 m
      - Average freeboard:   6.44 ft / 1.96 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 187.9 %
      - Above water (accommodation/working, high = better): 38.7 %
   Waterplane Area: 1,784 Square feet or 166 Square metres
   Displacement factor (Displacement / loading): 34 %
   Structure weight / hull surface area: 17 lbs/sq ft or 84 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.29
      - Overall: 0.54
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is extremely poor
   Caution: Lacks seaworthiness - very limited seakeeping ability

Misc Weight:
4t: 2x21" Torpedoes
2t: Reserve
- or -
6t: Mines

Range at max speed: 230nm, or 8 hours
Trial Speed: 34 knots

[Jefgte]

This is really a small 200t coastal multirole ship.
- Coastal patrol
- Fishing assistance.
- Minesweeping.
- Harbor protection. Abble to make rush with 2 torpedoes.

25 t misc are for # material; minesweeping...

For patrols, she needs correct seaboat quality.


Jef

[Jefgte]

- Coastal patrol
- Fishing assistance.
- Minesweeping.
- Harbor protection

I increase range to 2500nm

CPTB, NUS 200t-2 laid down 1919 (Engine 1916)

Displacement:
   200 t light; 208 t standard; 235 t normal; 257 t full load

Dimensions: Length overall / water x beam x draught
   173.53 ft / 170.60 ft x 17.72 ft x 6.14 ft (normal load)
   52.89 m / 52.00 m x 5.40 m  x 1.87 m

Armament:
      1 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1916 Model
     Quick firing gun in deck mounts
     on centreline, all forward
      2 - 1.57" / 40.0 mm guns (1x2 guns), 1.95lbs / 0.88kg shells, 1916 Model
     Anti-aircraft guns in deck mount
     on centreline aft
      2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1919 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 36 lbs / 16 kg
   Shells per gun, main battery: 160
   2 - 18.0" / 457.2 mm above water torpedoes

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.50" / 13 mm         -               -
   2nd:   0.50" / 13 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 1 shaft, 4 400 shp / 3 283 Kw = 23.98 kts
   Range 2 500nm at 12.00 kts
   Bunker at max displacement = 49 tons

Complement:
   29 - 39

Cost:
   £0.056 million / $0.225 million

Distribution of weights at normal displacement:
   Armament: 5 tons, 1.9 %
   Armour: 1 tons, 0.6 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 1 tons, 0.6 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 107 tons, 45.6 %
   Hull, fittings & equipment: 71 tons, 30.0 %
   Fuel, ammunition & stores: 35 tons, 15.1 %
   Miscellaneous weights: 16 tons, 6.8 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     74 lbs / 34 Kg = 2.3 x 4.0 " / 102 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.12
   Metacentric height 0.5 ft / 0.1 m
   Roll period: 10.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.28
   Seaboat quality  (Average = 1.00): 1.06

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.444
   Length to Beam Ratio: 9.63 : 1
   'Natural speed' for length: 13.06 kts
   Power going to wave formation at top speed: 69 %
   Trim (Max stability = 0, Max steadiness = 100): 67
   Bow angle (Positive = bow angles forward): 12.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      13.78 ft / 4.20 m
      - Forecastle (20 %):   10.50 ft / 3.20 m
      - Mid (50 %):      7.87 ft / 2.40 m
      - Quarterdeck (16 %):   7.22 ft / 2.20 m
      - Stern:      6.56 ft / 2.00 m
      - Average freeboard:   8.79 ft / 2.68 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 169.3 %
      - Above water (accommodation/working, high = better): 66.3 %
   Waterplane Area: 1 826 Square feet or 170 Square metres
   Displacement factor (Displacement / loading): 62 %
   Structure weight / hull surface area: 17 lbs/sq ft or 82 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 3.13
      - Overall: 0.60
   Caution: Hull subject to strain in open-sea
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped
   Ship has slow, easy roll, a good, steady gun platform

[Sachmle]

- Coastal patrol
- Fishing assistance.
- Minesweeping.
- Harbor protection

If those are your intended functions then I'd cut the speed to ~18kts and switch to ICE engines or diesels.